The hose hoop is a fastener at the joint of soft and hard pipes. The throat hoop solves the problem of dead angle and liquid and gas leakage when the throat hoop is used for the connection of small diameter soft and hard pipes in the prior art. The throat hoop adopts an open inner and outer ring structure and is fastened with bolts. The utility model solves the problem that the diameter of the hose hoop is 30% for the waste water of the original automobile and the chemical vehicle, and is easy to be connected with the hard pipe of the original chemical vehicle for purifying the waste water and gas.

Features of throat hoop: worm friction is small, which is suitable for high and medium-sized vehicles or parts of anti-corrosion materials. The hose hoop has a wide range of application, torsion resistance and pressure resistance. It has balanced torsion torque, firm and tight locking, and wide adjustment range. It is suitable for fasteners connected with soft and hard pipes of more than 30mm in appearance after assembly.